Can It be done

By that I mean, can I just add the needed parts to my centos 5.9 server , running bind9, setup the mysql etc etc. as per all these great tutorials here.

Then get it to use or import the " current dns " settings for all zones ( over 250 )
Then I add my ns2, and even ns3 as per tutorials, so all will be synced, and only ever adding/removing zones from the master NS1.